Zystische Nierenläsionen

Abstract

Cystic renal lesions are most often simple or complicated cysts, which can be seen solitary or as part of cystic renal disease. The minority of these lesions are benign or malignant cystic tumors. The classification of cystic renal masses by Bosniak (category l - IV) based on specific ultrasound and CT features is very useful for the characterization of the lesion and for the therapeutic decision. The main objective of this classification is to differentiate nonsurgical (category II) from surgical cystic masses (category III/IV). Ultrasound is the first modality of choice in the diagnostic work-up of cystic renal masses, because an accurate and economically reasonable diagnosis of the frequent simple cyst can be made by maintaining rigid ultrasound criteria of the Bosniak classification. If a complicated cyst or a cystic tumor is suspected a three phasic contrast-enhanced CT of the kidneys should be performed. MRI is superior to CT in the characterization of complex cystic masses.

Intraperitoneal marsupialization of a giant para-pelvic renal cyst: A case report

“…1 In our patient, however, the CT revealed only mild hydronephrosis. This might be explained by the fact that the cyst in our case was para-pelvic and did not cause significant compression of the collecting system.…”

“…1 An overall prevalence of 11.9% has been reported, with frequency increasing with age. 2,3 The natural history of these cysts increases in size 2 and renal dysfunction and hypertension are considered risk factors.…”

“…Polycystic kidney disease is the most common among these disorders followed by von-Hippel Lindau syndrome and tuberous sclerosis. 1 Various imaging modalities have been used to characterize renal cysts. Ultrasonography and computed tomography (CT) are most often used and can differentiate between simple and complex cysts.…”

“…Ultrasonography and computed tomography (CT) are most often used and can differentiate between simple and complex cysts. 1 Bosniak proposed a classification of renal cysts based on their radiographic appearances. 5 Simple renal cysts often remain asymptomatic.…”